Lupin III: The Secret of Mamo is an anime film that premiered in fall 1978, produced by Tokyo Movie Shinsha.

About the production: the story comes from a manga, the film runs about 102 minutes and its current status is "finished".

Its main genres are adventure, comedy, mystery and sci-fi, with themes such as Foreign, Guns, Anti-Hero and Fugitive.

On AniList, Lupin III: The Secret of Mamo has an average score of 70%, a good score, and appears on 6,421 users' lists.

The franchise continues in or follows from: LUPIN THE IIIRD THE MOVIE: Fujimi no Ketsuzoku.

Lupin, the master thief/spy/Jack of all Trades, has been executed, but he is still alive, and not even Lupin himself knows how that is possible. While trying to figure out, however, he and his gang are thrust into a conspiracy involving clones, Lupin's un-trustworthy rival Fujiko, and a miniature madman's plot to take over the world. (Source: Anime News Network)

Official synopsis from AniList.